Platform: Add Musca test chip support

1) Files derived from the following keil packs
    keil-pack-musca-a1 release_v1.0.1
    keil-pack-sse-200  release_v1.0.3
2) Add Musca target configuration and partition files
3) Add Musca platform support in cmake files
4) Enable BL2 with Musca test chip
5) Create signed binary with correct size for MPS2 platforms

Change-Id: I0ab913110b0817b7e8d7424812b978526487a3d0
Signed-off-by: Avinash Mehta <avinash.mehta@arm.com>
diff --git a/CommonConfig.cmake b/CommonConfig.cmake
old mode 100644
new mode 100755
index 2ffe115..37368e3
--- a/CommonConfig.cmake
+++ b/CommonConfig.cmake
@@ -54,6 +54,8 @@
 
 if(${TARGET_PLATFORM} STREQUAL "AN521" OR ${TARGET_PLATFORM} STREQUAL "AN519")
 	set (REFERENCE_PLATFORM ON)
+elseif(${TARGET_PLATFORM} STREQUAL "MUSCA_A")
+	add_definitions(-DTARGET_MUSCA_A)
 endif()
 
 if (REGRESSION)